The daily deals site waited until after the close of markets yesterday to tell investors that it was revising its fourth-quarter profit and sales lower to reflect higher customer refunds.

Groupon said its loss widened to $65 million on sales of $492 million, compared to its earlier reported loss of $43 million and sales of $507 million.

The company blamed the higher refund rate on customers who purchased more expensive deals. Consumers are more likely to return large-ticket items, the company said in a filing with the Securities and Exchange Commission.

This was not the first time CEO Andrew Mason’s company has had to change its revenue tune.

Before Groupon went public in November, the SEC forced it to reduce its top line by half to reflect only the money it takes in from sales, and not the money that eventually goes to merchants.

For some Groupon watchers, the accounting snag represented yet another reason to steer clear of the daily deals company.

“This is just the last straw — or should be — for most investors,” said analyst Sam Hamadeh, CEO of PrivCo. “And the CFO, Jason Child, who had only been a controller before Groupon hired him, needs to be fired immediately.”

Investors sent Groupon shares down 7 percent after hours to $17.10.

Groupon also extended the lock-up period for insiders to start selling their stock until June, after first-quarter results are announced May 14.